Rock managed the warehouse at Lepant's mansion in Kouan, but when Lepant joined the Liberation Army, he became the Warehouse keeper of the Liberation Army's vault at Toran Castle. There he was also part of the "Cooks" regiment. His dream was to own a huge warehouse and to manage it. His dream came true after the war, when he was appointed to manage the inventory of the Toran Republic. - Blue Moon

Gameplay Information for Suikoden

How to Recruit: Speak to him in the Vault in Lepant's mansion. Allow him to join.